In recent months, Microsoft’s ads have tried to convince us that Apple computers are expensive and not worth the high price. Now, Microsoft is targeting Google’s search engine with its latest marketing campaign. The software giant is preparing to launch an $80 to $100 million ad campaign for Bing (previously known as Kumo). Bing is the company’s new search engine that Microsoft hopes will help it grab a larger portion of the online ad market. An $80 to $100 million ad campaign is very sizeable. By comparison,